84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*-
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* Copyright (c) 2002 Mitsaru Iwasaki
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* ACPI Table interfaces
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/endian.h>
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#include <sys/kernel.h>
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#include <sys/linker.h>
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#include <contrib/dev/acpica/acpi.h>
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#include <contrib/dev/acpica/actables.h>
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#undef _COMPONENT
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#define _COMPONENT ACPI_TABLES
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static char acpi_osname[128];
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TUNABLE_STR("hw.acpi.osname", acpi_osname, sizeof(acpi_osname));
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ACPI_STATUS
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AcpiOsPredefinedOverride(const ACPI_PREDEFINED_NAMES *InitVal,
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ACPI_STRING *NewVal)
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{
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if (InitVal == NULL || NewVal == NULL)
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return (AE_BAD_PARAMETER);
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*NewVal = NULL;
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if (strncmp(InitVal->Name, "_OS_", ACPI_NAME_SIZE) == 0 &&
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strlen(acpi_osname) > 0) {
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printf("ACPI: Overriding _OS definition with \"%s\"\n", acpi_osname);
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*NewVal = acpi_osname;
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}
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return (AE_OK);
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}
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ACPI_STATUS
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AcpiOsTableOverride(ACPI_TABLE_HEADER *ExistingTable,
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ACPI_TABLE_HEADER **NewTable)
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{
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caddr_t acpi_dsdt, p;
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if (ExistingTable == NULL || NewTable == NULL)
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return (AE_BAD_PARAMETER);
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/* If we're not overriding the DSDT, just return. */
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if ((acpi_dsdt = preload_search_by_type("acpi_dsdt")) == NULL ||
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(p = preload_search_info(acpi_dsdt, MODINFO_ADDR)) == NULL) {
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*NewTable = NULL;
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} else
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*NewTable = *(ACPI_TABLE_HEADER **)p;
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return (AE_OK);
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}
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